Book-cover.



PATENTED JUNE 19, 1906.

C. A. JOHNSON.

BOOK COVER.

APPLIOATION FILED sEPTv.2o,19o5.

ANMEW B GRAHAM cn.. PnoTo-Ll'mosRAPMEns. whsHlNGroN. n. e.

PATENT' OFFICE.

CHRISTIAN A, JOHNSON, .or CHICAGO, ILLINOIS.

Specification of Letters Patent.

BooK-COVER.

Patented J une 19, 1906.

Application filed September 20, 1905. Serial No. 279,240.

To @ZZ whom it may concern,.- 4

Be it known that I, CHRISTIAN A. JOHN- SON, of Chicago, in the State of Illinois, have invented certain newyand useful Im'rovements in Book-Covers, of which the ollowing is aspecification.

This invention relates to frames for the covers of loose-leaf binders, record-books,and the like, which require strong durable'side covers adapted to stand rough usage and usually made of several layers of cardboard glued and pressed together and covered with leather, cloth, or paper as a finish. Such covers are solid and strong and Serve their purpose well in all respects except as to the weight which is thereby added to the book.

It is the object of my improvement to provide a cover for this class of-books which will be lighter, of equal strength and durability, and cheaper than those of the usual make, the decrease in weight of coverbeing a decided benefit in the increased convenience of handling the book. I have attained this object by providing the cover for the sides of the book with a strong marginal frame made of .light woody or other suitable material and adapted to receive and support outer and inner side boards or plates and braces, so as to form a hollow space or spaces within the central portion of the cover surrounded by such frame, the whole being covered with leather orv the like in the usual manner for the finish.

The accompanying drawings illustrate the invention as applied to a loose-leaf binder.

Figure 1 is a central section through such book. Fig. 2 is a perspective view showing the upper side and two of the edges of the marginal frame detached. Fig. 3 is a detail showing a section on the line 3 3 of Fig. 2.,

In Fig. l the parts for holding in loose leaves are but partially illustrated in section .or by dotted lines.

These not constituting any part of the present invention, it is not deemed necessary to further show or particularly describe them.

In the drawings, the numeral 1 designates the back piece of the cover, and 2 the side parts, which may be hinged to the back piece at 3 in any ordinary way. The side parts 2 are comprised' of a marginal frame 4, Fig. 2, of the desired dimensions and constructed, preferably, of light soft wood, mortisedand glued, a brace 5, (one o r more,) a thin top or outer board 6, and bottom or inner board 7, saidboards being fitted and glued in rabbets 8 ofthe frame members and lying flat against the brace 5. Ordinary light cardboard will answer for said parts -6 and 7. Over the side parts thus united is drawn and glued thereto a cover 9 of cloth or leather finishing in any ordinary design.

A referable way of uniting the members 'of the rame and brace is to provide a kerf 10 along the entire inner dge of two of the opposite members, in which a corresponding tongue l0a on the ends of the other or cross members will fit and Slide, so as to enable one or more ofthe braces to be applied, the parts being glued, and so becoming fixed in position when dried. An extra kerf 11, extending clear through the frame members at the ends next to the back piece 1, as shown in Fig. 3, may be provided, if desired, in which the leaf 12 of a metal hinge may be secured by rivets when the parts 1 and 2 are connected by means of metal hinges, as shown in Fi 1. The outer margins of the frame may be beveled, as shown, and the corners at the side opposite the hinge rounded, or any other desired finish for the edge provided.4 d

A hollow space within the marginalv frame and between the boards 6 and 7 of threeeighth inch, more or less, in depth is vthus made, except at the brace 5, and the material ordinarily used in this space is dispensed with. The construction is such that the boards 6 and 7 resist the racking ofthe frame by Strain or knocks applied against the edges, and the use puts very little strain upon the sides. From this it results that the side parts of the cover constructed, substantially as specified, of less material and lighter weight than ordinary will answer for the purpose intended with better Satisfaction than a solid cover.

What is claimed is- 1. A book-cover of the class described comprising the back piece in combination with the side parts composed of a rigid marginal frame, braces and side parts connected to form a hollow Space, andthe outer nishing layer applied and secured to the same as specified. l

2. In a book-cover of the class specified, a

IOO

marginal frame for the side parts comprising opposite members provided with a kerf along their entire inner edges, other members having corresponding tongues on theirv opposite k ends, rabbets formed around the inner mar- Witnesses:

gin of said frame on opposite sides thereof in MABEL A. Boss, combination With oppostely-arranged thin ANNIE M. ADAMS.

boards fitted and glued Within said rabbets, and an outer. fmslng-cover as specified.

` CHRIS. A. JOHNSON. 

